您将回调添加到 http.Client.CheckRedirect

    // CheckRedirect specifies the policy for handling redirects.
    // If CheckRedirect is not nil, the client calls it before
    // following an HTTP redirect. The arguments req and via are
    // the upcoming request and the requests made already, oldest
    // first. If CheckRedirect returns an error, the Client's Get
    // method returns both the previous Response and
    // CheckRedirect's error (wrapped in a url.Error) instead of
    // issuing the Request req.
    //
    // If CheckRedirect is nil, the Client uses its default policy,
    // which is to stop after 10 consecutive requests.
    CheckRedirect func(req *Request, via []*Request) error

然后，您可以在发生新请求时对其进行检查。只要确保设置某种限制来防止重定向循环（如文档中所述，默认值在10点后中止）。